<!DOCTYPE html> <html lang="zh"> <head> <meta charset="utf-8"> <title>留言板</title> <link rel="stylesheet" href="main.css" type="text/css"> </head> <body> <h1>留言板</h1> <form action="/post" method="post"> <p>请留言</p> <table> <tr> <th>名字</th> <td> <input type="text" size="20" name="name"> </td> </td> </tr> <tr> <th>留言</th> <td> <textarea rows="5" cols="40" name="comment"></textarea> </td> </tr> </table> <p><button type="submit">提交</button></p> </form> <div class="entries-area"> <h2>留言记录</h2> <h3>游客 的留言 （2017年11月2日21:45:05）</h3> <p> 留言内容<br> 留言内容 </p> </div> </body> </html>
body{ margin: 0; padding: 0; color: #000E41; background-color: #004080; } h1{ padding: 0 1em; color: #FFFFFF; } form{ padding: 0.5em 2em; background-color: #78B8F8; } .main { padding: 0; } .entries-area{ padding: 0.5em 2em; background-color: #FFFFFF; } .entries-area p{ padding: 0.5em 1em; background-color: #DBDBFF; }
留言板
留言板
留言记录
游客 的留言 （2017年11月2日21:45:05）
留言内容
# -*- coding: utf-8 -*- from __future__ import with_statement import sqlite3 from flask import Flask, request, session, g, redirect, url_for, abort, render_template, flash from contextlib import closing # configuration DATABASE = 'D:codingpy2.7liuyanguestbook.dat' # 数据库存储路径 DEBUG = True SECRET_KEY = 'development key' USERNAME = 'admin' PASSWORD = 'default' # create our little application :) app = Flask(__name__) app.config.from_object(__name__) app.config.from_envvar('FLASKR_SETTINGS', silent=True) def connect_db(): # 快速连接到指定数据库的方法 return sqlite3.connect(app.config['DATABASE']) def init_db(): # 初始化数据库 with closing(connect_db()) as db: with app.open_resource('schema.sql') as f: db.cursor().executescript(f.read()) db.commit() @app.before_request def before_request(): g.db = connect_db() @app.teardown_request def teardown_request(exception): g.db.close() @app.route('/') def show_entries(): # 输出函数,会将条目作为字典传递给 show_entries.html 模板，并返回之后的渲染结果 cur = g.db.execute('select name,email,text from entries order by id desc limit 10') entries = [dict(name=row[0], email=row[1], text=row[2]) for row in cur.fetchall()] return render_template('show_entries.html', entries=entries) @app.route('/add', methods=['POST']) def add_entry(): # 用户添加新的留言信息函数，并只响应 POST 请求，表单显示在 show_entries if not session.get('logged_in'): abort(401) if len(request.form['text']) > 50 and len(request.form['text']) < 500: # 实现控制字数在50到500范围内 g.db.execute('insert into entries (name,email,text) values (?,?,?)', [request.form['name'], request.form['email'], request.form['text']]) g.db.commit() flash('New entry was successfully posted') else: flash('The input range must be between 50 and 500 characters ') # 如果留言信息不在范围内作出提示 return redirect(url_for('show_entries')) @app.route('/login', methods=['GET', 'POST']) def login(): # 登入函数 error = None if request.method == 'POST': if request.form['username'] != app.config['USERNAME']: error = 'name error' elif request.form['password'] != app.config['PASSWORD']: error = 'password error' else: session['logged_in'] = True flash('log in') return redirect(url_for('show_entries')) return render_template('login.html', error=error) @app.route('/logout') def logout(): # 退出登录函数 session.pop('logged_in', None) flash('log out') return redirect(url_for('show_entries')) if __name__ == '__main__': init_db() app.run(debug=True)
留言内容